The normal size of a ruler should be 12 inches or 30cm.
(30 cm=300 mm)
(1 in=25 mm)
The answer will depend on how long the ruler is!
The word "ruler" contains a short vowel sound. In linguistics, a short vowel sound is one that does not sound like its corresponding letter name. In this case, the "u" in "ruler" is pronounced as /ʌ/, which is a short vowel sound.
As long as a ruler :)
a ruler
100. An ordinary cm ruler is not likely to be long enough.
Look at a ruler, if you don't know....
A standard ruler is typically 30cm long, so an object that is 19.5cm long could be a smaller ruler, a pencil, or a regular sized envelope.
25.88m = 84.91 ft, rather a long ruler.
Twice the size of a regular ruler
a ruler
by ruler
a foot